BASEMENT FORCE LIMITED

What BASEMENT FORCE LIMITED does

Basement Force Limited is a privately held specialist ground engineering and structural refurbishment contractor incorporated in England (Company No. 02986065) and headquartered in Isleworth, London. Founded in 1994, the firm undertakes below-ground structural works throughout London and Greater London, with project values ranging from £100k to £15m. It is one of the first contractors to construct modern basements beneath existing residential buildings in London and has completed more than 250 such projects. Its service offering is organized around four integrated lines: basements and substructures (underpinning, reinforced concrete, Pynford beams, mini piling, basement excavation); structural refurbishment (temporary works design, facade retention, demolition, propping, jacking, structural steelwork); protection against damp and water (Type A, B and C waterproofing to BS8102 and NHBC standards using CSSW-certified surveyors); and demolition and temporary works for heritage, listed, and super-prime properties.

The business operates on a project-based contracting model, quoting and delivering bespoke basement construction engagements rather than selling standardised products. Pricing is quote-based and not publicly disclosed; projects are billed as multi-year contracts with single-digit-to-mid-single-digit project counts per year implied by historical throughput. Its customer base spans four segments: homeowners undertaking residential basement extensions; professional advisors (architects, designers, structural engineers) specifying Basement Force into project teams; London's leading residential main contractors for whom it serves as a specialist subcontractor; and major insurers, local authorities, and housing associations commissioning remedial foundation work.

Go-to-market is sales-led and reputation-driven, with the majority of new work originating from repeat customers or personal recommendations rather than paid marketing. Channels are limited to direct enquiry (website forms, phone, email) and a network of more than 28 architecture firm partnerships that function as a referral ecosystem. The firm holds ASUC membership, which is a prerequisite for basement work on Grosvenor and Cadogan Estates in central London, and its directors have co-authored several UK industry guidance publications, giving the company a defensible position in the regulated, expertise-intensive London super-prime basement segment.

Name

BASEMENT FORCE LIMITED

Legal name

BASEMENT FORCE LTD

Website

https://basementforce.co.uk

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

11–50 employees

Short description

Basement Force Limited is a London-based specialist contractor founded in 1994 that constructs basements, underpinning, waterproofing, and structural refurbishment works beneath existing residential buildings, serving homeowners, architects, engineers, main contractors, and public-sector remedial clients with projects valued from £100k to £15m.

Ownership category

akta.pro rank

Product category

Specialist Basement Construction Services

NAICS

Site Preparation Contractors (23891), Poured Concrete Foundation and Structure Contractors (23811)

SIC

General Bldg Contractors - Residential Bldgs (1520), Heavy Construction Other Than Bldg Const - Contractors (1600)

akta.pro primary industry

Basement Waterproofing & Moisture Control (HSAPACAA)

akta.pro secondary industries

Trenching & Utility Excavation (IMAFAKAD), Underground Downspout Drain Lines (Installation, Cleaning & Repair) (HSAIAKAG)

Keywords

• Basement construction services
• Ground engineering contractor
• Structural refurbishment works
• Underpinning and piling
• Below ground waterproofing

Headquarters

HQ city

Isleworth

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Basement Construction Services: Specialist contractor services for basement construction and ground engineering projects with values between £100k and £15m. Projects include basements and substructures, structural refurbishment, waterproofing, and demolition/temporary works.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Basement Force is a specialist ground engineering and structural refurbishment contractor delivering basement construction, underpinning, waterproofing and demolition/temporary works services for residential properties in London. The firm builds basements below existing buildings, refurbishes superstructures, and provides Type A, B and C waterproofing installations in line with BS8102 and NHBC standards, with project values ranging from £100,000 to £15 million.

Product overview

Basement Force is a specialist ground engineering and structural refurbishment company offering basement construction services. The company provides four integrated service areas: (1) Basements and Substructures - core basement construction below existing buildings including underpinning, reinforced concrete, and mini piling; (2) Structural Refurbishment - above ground structural works including temporary works design, facade retention, and structural steelwork; (3) Protection Against Damp and Water - comprehensive waterproofing with Type A, B and C installations including tanking, cavity drainage and pump systems; and (4) Demolition and Temporary Works - specialist demolition and temporary works design for heritage and complex properties. The company also offers remedial foundation work for insurers, local authorities, and housing associations.

Differentiator

Problem solved

Functional benefit

Products and services

• Basements and Substructures

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

29 partnerships are on record, tiered core.

• AA ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• BHD ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Casson CondorcoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• DNA ArchitecturecoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• drawArchitecturecoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Edward Williams ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• FabricacoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Flower Michelin ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• GriegcoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Hackett HollandcoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• HUBcoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• JCAcoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• lab ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Layzell ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Michaelis BoydcoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• MorenoMaseycoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Nash Baker ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• P and RcoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Quinn ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• RBDcoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• RB Studio ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Smallwood ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• SolindancoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• SpacelycoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Stanhope GatecoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Studio IndigocoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Tigg + Coll ArchitectscoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• Urban MeshcoreStrategic or Co-development PartnerProfessional partner architecture firm with collaborative relationship for basement construction projects.
• ASUC (Association of Specialist Underpinning Contractors)coreOthersTrade body membership promoting high standards in specialist foundations industry. Membership required for basement construction work on Grosvenor or Cadogan Estates in central London. Entry requirements cover technical competence, staff training, financial strength, insurance and health and safety. Only 1 in 10 contractors successfully satisfy entry requirements.

Scale indicators4 records

Recent moves5 records

Expansion highlights3 records

Direct peers

• Apex Basements London: Specialist basement conversions and underpinning contractor operating in London and the South East, targeting the same residential and architecture-led project flow.
• Company of Experts (Basements): London-focused basement construction and underpinning specialist; comparable operating model, customer base (high-net-worth homeowners and architects), and project value range.
• London Basement Company: Specialist London basement construction contractor offering underpinning, substructure, and waterproofing for residential properties — direct overlap with Basement Force on customer type, geography, and core service delivery.
• Premier Basements: UK basement design-and-build contractor serving both new-build substructure and conversions, overlapping with Basement Force in residential construction and waterproofing scopes.
• Makegood Group: London specialist contractor combining basement construction, underpinning, and superstructure refurbishment — directly comparable service mix, customer types, and ASUC membership scope.

Broad incumbents

• Peter Cox Property Care: Nationally scaled damp-proofing, waterproofing, and basement conversion contractor in the UK; broader portfolio overlap with Basement Force's waterproofing and remedial foundation lines.
• Rentokil Property Care: National damp-proofing, waterproofing, and basement services brand — overlapping capabilities on waterproofing and remedial works though not a specialist basement constructor.

Emerging players

• Property Repair Systems: UK contractor specialising in basement waterproofing, structural repairs, and remedial foundation works — adjacent service mix to Basement Force with partial overlap on damp and waterproofing installations.
• Sovereign Waterproofing Services: UK basement waterproofing and tanking contractor serving residential remedial markets — overlaps with Basement Force's Type A/B/C waterproofing capability though narrower scope.
• Wykamol Group: UK specialist in waterproofing systems, structural repairs, and below-ground damp protection — supplies Type A/B/C systems and offers contracting overlap with Basement Force's waterproofing scope.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/basement-force-limited

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about BASEMENT FORCE LIMITED